Stock identification and its role in stock assessment and fisheries management: an overview

Begg, Gavin A.; Friedland, Kevin D.; Pearce, John B.

doi:10.1016/s0165-7836(99)00062-4

Cited by 430 publications

(277 citation statements)

References 5 publications

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“…Only a few characters were needed for a good classification. Such groupings based on morphology may represent adaptations to the environment on a rather short time scale compared to genetics, as BEGG, FRIEDLAND and PEARCE (1999) assumed in their work. An example in crayfish is the areolar width, which is apparently correlated with water velocity.…”

Section: Discussionmentioning

confidence: 99%

“…It is known that organisms tend to adapt in various ways to their specific environmental conditions and some of these adaptations may also influence the morphology. Although, there may exist some cases where, all the variability can be explained either by phenotypical variation of the genome (IMRE, MCLAUGHLIN and NOAKS, 2002) or by genotypical differences (PAKKASMAA, 2001), in most cases both mechanisms play an important role (JERRY and CAIRNS, 1998;BEGG, FRIEDLAND and PEARCE, 1999;IMRE, MCLAUGHLIN and NOAKS, 2002). According to SWAIN and FOOTE (1999) and BEGG, FRIEDLAND and PEARCE (1999), phenotypical variation among populations is not necessarily associated with differences in the genome.…”

Section: Introductionmentioning

confidence: 99%

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Morphological Variations in Astacus Astacus L. And Austropotamobius Pallipes (Lereboullet) Populations

Sint¹,

Via

Füreder³

2005

Bull. Fr. Pêche Piscic.

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Genetic studies on crayfish have shown that the differences between crayfish populations can be greater than it is assumed at the first view. Studies have demonstrated that some of these differences are not only found in the genome but are also expressed in the morphology of crayfish. Statistical analysis of a large set of morphological parameters from several autochthonous crayfish populations of Astacus astacus (Linnaeus, 1758) and Austropotamobius pallipes (Lereboullet, 1858) were applied in order to define distinct characteristics of different populations. Preliminary results of a multivariate discriminant analysis suggest that some morphological parameters are useful attributes to identify distinct populations. A positive correlation was obtained between carapace shape, described as the ratio postorbital length/width of carapace, and carapace curvature. Our results showed that the development and application of methods to characterize the uniqueness of individual populations is important, especially when they may have adapted in various ways to specific environmental conditions due to separation for a long time. Key-words:Crayfish, endangered species, morphometry, environmental adaptation. VARIATIONS MORPHOLOGIQUES DES POPULATIONS D'ASTACUS ASTACUS L. ET D'AUSTROPOTAMOBIUS PALLIPES (LEREBOULLET) RÉSUMÉDes études génétiques sur des écrevisses ont démontré que les différences entre les populations d'écrevisses peuvent être plus importantes qu'on ne pouvait le supposer a priori. Des études ont démontré que certaines différences ne sont pas uniquement génétiques mais aussi morphologiques. Des analyses statistiques sur un grand nombre de paramètres morphologiques sur plusieurs populations d'Astacus astacus (Linnaeus, 1758) et d'Austropotamobius pallipes (Lereboullet, 1858) ont été menées pour définir des caractères distinctifs des différentes populations. Les résultats préliminaires d'une analyse multivariée discriminante suggèrent que quelques caractéristiques morphologiques sont utiles pour identifier des populations distinctes. Si la forme de la carapace, ici décrite par le coefficient de la longueur post orbitale/largeur de la carapace, et la courbure de la carapace sont utilisés, une corrélation positive entre ces deux paramètres est obtenue.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Morphological Variations in Astacus Astacus L. And Austropotamobius Pallipes (Lereboullet) Populations

Sint¹,

Via

Füreder³

2005

Bull. Fr. Pêche Piscic.

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“…First, the European flounder Platichthys flesus (Linnaeus, 1758) is a species of economic importance in the Atlantic coast of Europe as well as in the Baltic Sea, where 16-24 thousand tons of this flatfish are caught per year (ICES, 2017). As the sustainable management of fish stocks requires understanding what constitutes a biologically meaningful demographic unit (Reiss et al, 2009), recognition of cryptic species within P. flesus can aid sustainable fisheries (Utter and Ryman, 1993;Begg et al, 1999;Sterner, 2007). As to the latter, we note that the pelagic and demersal flounders can co-occur, at times in similar proportions, in various locations of the central and northern Baltic Sea (Momigliano et al, 2017a; see also Figure 1B), and therefore, constitute a mixed stock fishery (Begg et al, 1999).…”

Section: Introductionmentioning

confidence: 88%

“…As the sustainable management of fish stocks requires understanding what constitutes a biologically meaningful demographic unit (Reiss et al, 2009), recognition of cryptic species within P. flesus can aid sustainable fisheries (Utter and Ryman, 1993;Begg et al, 1999;Sterner, 2007). As to the latter, we note that the pelagic and demersal flounders can co-occur, at times in similar proportions, in various locations of the central and northern Baltic Sea (Momigliano et al, 2017a; see also Figure 1B), and therefore, constitute a mixed stock fishery (Begg et al, 1999). This unobserved diversity could lead to overexploitation of the most vulnerable stock component (Sterner, 2007), and it is therefore important to provide means for distinguishing between the two species.…”

Section: Introductionmentioning

confidence: 99%

Platichthys solemdali sp. nov. (Actinopterygii, Pleuronectiformes): A New Flounder Species From the Baltic Sea

et al. 2018

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The European flounder Platichthys flesus (Linnaeus, 1758) displays two contrasting reproductive behaviors in the Baltic Sea: offshore spawning of pelagic eggs and coastal spawning of demersal eggs, a behavior observed exclusively in the Baltic Sea. Previous studies showed marked differences in behavioral, physiological, and life-history traits of flounders with pelagic and demersal eggs. Furthermore, a recent study demonstrated that flounders with pelagic and demersal eggs represent two reproductively isolated, parapatric species arising from two distinct colonization events from the same ancestral population. Using morphological data we first established that the syntypes on which the original description of P. flesus was based belong to the pelagic-spawning lineage. We then used a combination of morphological and physiological characters as well as genome-wide genetic data to describe flounders with demersal eggs as a new species:Platichthys solemdali sp. nov. The new species can be clearly distinguished from P. flesus based on egg morphology, egg and sperm physiology as well as via population genetic and phylogenetic analyses. While the two species do show some minor morphological differences in the number of anal and dorsal fin rays, no external morphological feature can be used to unambiguously identify individuals to species. Therefore, we developed a simple molecular diagnostic test able to unambiguously distinguish P. solemdali from P. flesus with a single PCR reaction, a tool that should be useful to fishery scientists and managers, as well as to ecologists studying these species.

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“…In previous studies, molecular markers such as isozymes and microsatellites have been utilized to help distinguish black crappie from white crappie and have been applicable to detect hybridization between the two species of crappie [7] [8] [9]. Molecular genetics techniques have also supported fisheries management by revealing reproductively isolated populations which require the formation of management units that assist in the generation of conservation strategies [10].…”

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confidence: 99%

Mitochondrial Haplotype Analysis of <i>Pomoxis nigromaculatus</i> Inhabiting Three Georgian Lakes

Erwin¹,

George²

2017

OJGen

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Pomoxis nigromaculatus, more commonly referred to as black crappie is indigenous to fresh water streams and lakes in the eastern United States and supports an important recreational fishery. We examined the genetic population structure of black crappie inhabiting three Georgian Lakes, Lake Sidney Lanier, Lake Seminole and Hartwell Lake. DNA sequencing of 229 fish samples, utilizing the DNA barcode marker cytochrome oxidase subunit I (COI) revealed 27 polymorphic sites which defined nine haplotypes. Only haplotype 2 was shared between all sample sites with six other haplotypes being unique for individual lakes, for an overall haplotype diversity of 0.734. Tajima's D and Fu's tests were implemented to assess departures from neutral expectations. Fst pairwise comparisons were statistically significant among all populations of black crappie evaluated in this study.

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Stock identification and its role in stock assessment and fisheries management: an overview

Cited by 430 publications

References 5 publications

Morphological Variations in Astacus Astacus L. And Austropotamobius Pallipes (Lereboullet) Populations

Morphological Variations in Astacus Astacus L. And Austropotamobius Pallipes (Lereboullet) Populations

Platichthys solemdali sp. nov. (Actinopterygii, Pleuronectiformes): A New Flounder Species From the Baltic Sea

Mitochondrial Haplotype Analysis of <i>Pomoxis nigromaculatus</i> Inhabiting Three Georgian Lakes

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Stock identification and its role in stock assessment and fisheries management: an overview

Cited by 430 publications

References 5 publications

Morphological Variations in Astacus Astacus L. And Austropotamobius Pallipes (Lereboullet) Populations

Morphological Variations in Astacus Astacus L. And Austropotamobius Pallipes (Lereboullet) Populations

Platichthys solemdali sp. nov. (Actinopterygii, Pleuronectiformes): A New Flounder Species From the Baltic Sea

Mitochondrial Haplotype Analysis of &lt;i&gt;Pomoxis nigromaculatus&lt;/i&gt; Inhabiting Three Georgian Lakes

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Mitochondrial Haplotype Analysis of <i>Pomoxis nigromaculatus</i> Inhabiting Three Georgian Lakes